ArtNet

If you've having problems sending ArtNet data is may be because your receivers don't support ArtNet II and/or send ArtPollReply messages. You can force OLA to always broadcast data by changing ~/.ola/ola-artnet.conf to contain:

always_broadcast = true

Streaming ACN / E1.31

All Platforms

Some older networking gear only supports an old revision of E1.31 Called Revision 20. To use this older version you need to change a line in ola-e131.conf. Change this line

revision = 0.46

to this line

revision = 0.2

Only do this if the older gear cannot accept the standardized version of E1.31.

Linux

If you are planning to receive large amounts of multicast traffic 20+, you will need to adjust the maximum amount of igmp memberships.
Use the following command:

For example this command sets the maximum number of igmp memberships to 256:

echo 256 | sudo tee /proc/sys/net/ipv4/igmp_max_memberships

Eurolite USB DMX512 PRO

Linux

Sometime the cdc_acm kernel module claims the device. If this happens you'll see errors like "Cannot claim device" and/or "another process has device opened for exclusive access". To avoid this you can remove the module (rmmod). A udev rule like what is used for the Anyma device should also work.

You may also need the following udev rule like this in /etc/udev/rules.d/10-local.rules

USBDMX2

Linux

There is an issue where the device isn't detected correctly the first time. You may need to restart OLA once the DMX Transmit led comes on.

Mac

There is an issue where the device isn't detected correctly the first time. You may need to restart OLA once the DMX Transmit led comes on.

Velleman VM166 / K8062

Mac

If you're installed from source you'll need the codeless KEXT which is available for OS X 10.9 and above or OS 10.8 and below. If you installed OLA from the mac binary package this is already included.

Some people have reported issues with the K8062 on Ubuntu 14.04.
Symptoms: When you plug in your K8062, Ubuntu responds with Kernel Panic.
Problem: comedi and vmk60xx kernel modules are loaded and crash the kernel.
Solution: WARNING! Attempt at your own risk.